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Electric Charges and Fields
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An electric dipole of length 10 cm having charge $\pm 6 \times 10^{-3} C$ placed at $30^{\circ}$ with respect to a uniform electric field, experiences a torque of magnitude $6 \sqrt 3 n-m$ .Calculate the potential energy of the dipole.
aims
physics
class12
ch1
electric-charges-and-fields
formative-capsule
fc-1.4
q17-b
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asked
Jun 3, 2014
by
meena.p
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1 Answer
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The potential energy of the dipole is $-0.18 J$
Hence B is the correct answer.
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Jun 3, 2014
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meena.p
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When an electric dipole of moment $|P|=q \times 2a$ is held at an angle $\theta$ with the direction of uniform external field E, a torque $T= PE \sin \theta$ acts on the dipole. This torque tries to align the electric dipole in the direction of the field. When P is along E $\theta =0^{\circ} , t= PE \sin 0=zero$ An electric dipole of length 10 cm having a charge $\pm6 \times 10^{-3} \;C$ placed at $30^{\circ}$ with respect to a uniform electric field experiences a torque of magnitude $6 \sqrt 3 N-m$ . Calculate magnitude of electric field.
asked
Apr 29, 2015
by
meena.p
cbse
class12
physics
ch-1
q88-b
medium
sec-b
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